Duo stroke series for shaping machines



Fb. 23 1932. w. F. ZlM-MERMANN, 1,346,780

DUO STROKE SERIES FOR SHAPING MACHINES Filed June 27, 1930 2 Sheets-Sheet l Feb. 23, 1932. w. F. ZIMMERMANN DUO STROKE SERIES FOB SHAPING MACHINES Filed June 27,

1930 2 Sheets-Sheet 2 MM 3511 @lbtommt Patented Feb. 23, 1932 WILLIAM F. ZIMMIERMANN, MAPLEWOOD. JERSEY, ASSIG1\TOR TO GOULD & EBERHARDT, OF NEWARK, NEW'JEIESEY, A CORPORATION OF NEW JERSEY DUO STROKE SERIES FOR SHAPING MACHINES Application filed June 27,

This invention relates to shaping machines and it has as an object so to improve the mechanism which effects reciprocation of the ram and movement of the work table that the efficiency ofthe machine will be greatly increased. More specifically stated an object of this invention is, without resorting to complicated mechanisms, materially to increase the number of available speeds of reciprocation of the ram and also to extend those speeds over a wider range.

Conventional shaping machines are usually provided with about eight speeds of ram reciprocation, those speeds'being arranged in geometric progression and ranging from about 9 strokes to 118 strokes per minute. It will thus'be perceived that there is necessarilya substantial difference between the adjacent speeds, this difference usually being in the neighborhood of fifty per cent of thelower rate. For example, in conventional shaping-providing eight stroke rates the two slower rates have beenap-- proximately 9 and 13 strokes per minute while the two fastest rates have been approximately 80 and 118 strokes per minute.

This-range and variation in stroke rates was satisfactory during the period that shapers were primarily special machines and were employed almost solely for tool room purposes. Recently, however, this type of machine tool has been so perfected that it is now recognized as a manufacturing machine capable of turning out work at a rate commensurate with present day quantity production.

To better adapt this type of machine tool to quantity production and to increase the efiiciency of the machine in its various uses this invention proposes an improved trans mission between the prime driver and the ram. reciprocating element whereby the stroke range will be extended and the number of available speeds will be materially increased. With my improved transmission it becomes possible in a so-called standard machine to reciprocate the ram at any one of sixteen speeds varying from approximately 7 A to 118 strokes per minute, from a single speed in the prime driver.

This invention further proposes the 'construction by means of which the sixteenspeeds may include a minimumspeed of one stroke per minute and a maximum speed of approximately 118 strokes per minute. f

Another object of the invention is so to construct and arrange the additional mech anism adapted to extend the stroke range V and increase the number ofspeed changes may be removed from the main frame of the 7 machine to permit certain speed change gears, carried by the clutch unit, to be removed'and replaced by others having adifferent ratio, thereby to produce different combinations of the sixteen available speed changes. This latter is of particular advantags to the manufacturer of the machine, inasmuch as it enables him to build standard shaping machines in large numbers and later readily to modify a machine to meet the specific demands of any customer who might require other than standard speeds.

Decided advantages are'attained by locating the main control clutch and the table rapid traverse train at the users side of the machine as distinguished from prior machines in which those elements were located at the side remote from the user. Among the advantages attained are the simplification of the connections between the clutch actuating lever and the rapid traverse control lever, which necessarily must be at the users side,

and the mechanism actuated by those levers,

and the elimination of the extra and undesirable rods, links, lever, etc. which otherwise would be required toextend to the opposite side of the machine.

ther objects and advantages will be in part indicated in the following description and in part rendered apparent therefrom in, connection with the annexed drawings' 5:9 adapted to be rotatedsele ctively at either a To enable others skilled in the art so fully to apprehend the underlying features hereof that they may embody the same in the various ways contemplated by this invention, drawings depicting a preferred typical construction have been annexed as a part of this disclosure and, in such drawings, like characters of reference denote corresponding parts throughout all the views, of which Figure 1 is a-side elevation of a shaping machine embodying the present invention, as viewed from the users side thereof. Fig. 2 is a diagrammatic development of the power transmission for reciprocating the ram and for propelling the work-table. Fig.3 is a disassembled detailed view-ofa removable sub-housing and certain interchangeable gearslassociated therewith, showing how said parts may be removed from the machine to permittheinterchange of said gears with other gears having diflerent ratios. Fig. 1 isadetailed view showing a modified driving connection between the main drive shaft and the gears on the clutch unit. Fig.5 is a left hand elevation of the gears shown in Fig. 4.

Referring more specifically to the drawings, this invention is disclosedas embodied in a shaping machine comprising a main housing 1 which supports, at its forward end, the usual work-table 2 and uponwhich is reciprocably mounted the usual tool-ram As in conventional shaping machines, the ram is given its reciprocatory movements by means ofa rocker-arm 4 actuated by a crankpin 5, adjustablysupported upon a bull-wheel 6 V The table 2 is propelled horizontally beneath the ram by: means of a nut 7 threaded upon a rotatable screw 8. This screw is slow: rate, to effect feeding movements of the table, or at a rapid rate, to effect rapid traverse movements of the table, by means later to be described. The transmission for rotating' the bull-wheel, and thereby thecrankpin 5, includes a shaft 9 journaled in the main housing transversely of the path of reciprocation of the ram. Splined upon the shaft 9 are two gear units 10 and 11 aflording, respectively, gears 1010 and gears 111l adapted to be meshed selectively with gears 12, 13, let and 15 rotatably mounted on ashaft 16 also supported in the main housing. These gears comprise a speed-change mechanism designated generally as B and serve tovmultiply by four each of the speeds received from the shaft 9. Fixed to the gear 12 is a gear 17 which meshes with, and drives a gear 18 forming a part of the shiftable gear- .unit 19 which also affords a gear 20. The gear-unit 19 is translatably mounted on a shaft 21 supported by the main housing and thegears 18 and thereof are adapted selectively to be-meshed with gears 22 and 23 of the bull-wheel. The gears. 18, 20, .22 and 23 comprise a speed-change mechanism desstated, the present invention provides in addition to the above :describedspeed changes, means whereby'as many as" 16 speeds may be transmitted to the bull wheel. This has been accomplished by the provision of an addition- 7 a1 speed-change mechanism designated generally as A and which later will be described.

Power to reciprocate the ram-andtto propel the work-table may :be provided: by any suitable prime driver, such, for example,as an electric motor P or a driving pulley P (as indicated in Fig. .2) ,connected to.amain drive shaft D journaled in the main housing, transversely thereof. The shaft D is, -.preferably connected with the prime driver bya separable coupling E which-permits the. removalof one type of primed driveriand the substitution thereof by, another type of driver. 'As shown in Fig.2, the two-speedspeed change. mechanism A, between thedrive shaft D and the shaft;9, comprisesashiftable gearunit 24 splined to the free end ofthe drive shaft. The .gear-unitr24 comprises, gears. 25 and26 adaptedselectively to be. meshed with complemental gears .27. and 28 removably secured upon a mainclutch element 29 rotatably journaled on the shaft,9. Asecond main clutch el'ementt30 splined to the. free end-of the shaft 9 serves,.uponmanipulation oflever. L located in the-users side of the machine to lock theclutch element 29- to the shaft 9, thereby to cause the shaft to be: ro-

tated; at either of two speedsas. maybe de termined by the selective engagement .ofthe gears 25 and 27 or 26 and28. .A gear-shifter 31 fixed upon a slide rod 32, having a handgrasp 33 located-at the users side ofv the machine, serves to shift the gear-unit24: on a shaft D, selectively to engage thegears25 and 27 or .26 and 28. The speed-change mechanism A and the main control clutchare mounted within a. sub-housing 34 removably secured upon the main housing at the .users side of the .machine. The sub-housing may beremoved at: will to permit removal of. the gears, 25,26, 27: and 28 and replacement thereof by similar gears of different size, thereby tovary the ratios betweenthe driving and driven gears whichwill, inturn, vary all of the speeds transmitted to: the ram.

:Feeding movements of the rwork-table are effected fronr the ram-reciprocating .means and in. time relation therewith. For .this purpose a cam 35 fixed upon the. rotary. .hub 6 of the bull-wheel serves to. push outwardly, always to the same eXtent,-a rack-plunger 36. An associatedrstationary cam..37 (set by a hand wheel H) serves to limit the retreat of said rack-plunger. The amplitude of stroke of the rack-plungerv is thus determined. A gear train, comprising gears 38, 39 and 40, of which the first is actuated by the rack-plunger, operates a pawl-carrier 41 carrying a pawl 42 which engages'a ratchet wheel 43 adapted to be clutched to a rotatable shaft 44. Actuation of the pawl effects, through the ratchet wheel 43, the shaft 44 and other connections later to be described, intermittent rotations ofthe feed screw 8 which, in turn, effects step-by-step movement of the work table.

Means also is provided for rotating the screw 8 at a rapid rate, thereby to effect rapid traverse movements of the work-table. This means comprises a sprocket 45 fixed to and rotating with the clutch element 29. A sprocket-chain 46 connects the sprocket 45 with a similar sprocket 47 which rotates through gears 48,49, 50 and 51 a clutch ele ment 52 rotatably journaled on the shaft 44. A clutch spool '53, splined to the shaft 44 and actuated by alever 54 at the operators side of the machine serves selectively to engage either the clutch element 52 or a similar clutch element formed on the hub of the ratchet wheel 43, thereby to connect to the shaft 44 either the gear 51, to effect rapid traverse'of the table, or the ratchet 43, to effect slow feed thereof. Bevel gears 55 and 56 convey the feed or traverse to a common shaft 57 carrying at its forward end a bevelgear 58 which drives at its diametrically opposite sides, bevel gears 59 and 60 rotatably' journaled on an un-threaded portion 8 of the screw 8. A clutch-spool 61 splined to the portion 8, and actuated by a lever 62, serves selectively to connect either a gear 59 or the gear 60 to the table-propelling screw 8.

Figs. 4 and5 show a modified construction of gearing embodied in the removable subhousing whereby the speed of rotation transmitted to the bull-wheel and consequently the speed of reciprocation of the ram may be as slow as one actuation per minute. In this construction the gear 25, provided by the gear-unit 24 splined to the drive shaft, is adapted to be meshed with a larger gear 65 carried upon a stub shaft 66 iournaled in the sub-housing 34. A pinion 67 rotatable with the gear 65 meshes with and drives an internal gear 68 fixed to the clutch element 29. The other gear 26 of the gear unit 24 is adapted to be engaged with the gear 28 on the clutch element 29, as hereinbefore described. It is to be understood that the modification shown in Fig. 4 is adapted to replace the speed change mechanism A shown in Fig. 2 and to combine with the speed change mechanisms B and G and the feed and rapid traverse trains for the work table. Inasmuch as it is obvious how this replacement may be effected further illustration and description thereof is deemed unnecessary.

thereto said driven gears.

Throughout this specification the term users side has been employed. By-that term is meant that side of the machine at which are located the feed rate changer, the shifter from feed to power-traverse, the direction reverser and the operating handgrasps therefor.

Without further analysis, the foregoing will so fully reveal the gist of this invention that others can, by applying current knowledge, readily adapt it for various utilizations'by retaining one or more of the features that, from the standpoint of the prior art, fairly constitute essential characteristics of either the generic or specific as pects of this invention and, therefore, such adaptations should be, and are intended to be, comprehended withinv themeaning and range of equivalency of the following claims.

operable change gears affording, respectively,

two, four and two speed changes between said main drive shaft'and said ram-reciprocating means for transmitting to the latter sixteen speeds from a single speed in the main drive shaft, one of said sets of change gears being arranged within said'sub-housing and being adapted to be removed and replaced by an other set having a difierent ratio thereby to vary the speeds 'transmitted to ram-reciprocating means.

, '2. In a' shaping machine including a main housing, a ram reciprocable thereon, means including a rotary crank and an oscillating rocker-arm actuated thereby for reciprocating said ram, a main drive shaft journaled in said housing, and a second shaft j ournaled in said housing transverse to the path of reciprocation of 'said ram, a multiple speed power transmission connecting said second shaft with said ram-reciprocating means; a multiple speed power transmission including a plurality of sets of'selectively engageable driving and driven gears of varying ratios mounted, respectively, on the main drive shaft and said second shaft, the driving gears being non-rotatable relative to the drive shaft, and the drivengears being rotatable on the second shaft; and a clutch mechanism mounted on said second'shaft for securing In a: shaping machine including: armain housing, a ram reciprocable thereon, means including a rotary crank and an oscillating rocker-armactua-ted'thereby for reciprocating said -ram,-and a maindrive-shaft and'a second shaft journaled insaid housing transverse to the path of reciprocation of saidram; amultiple speedpower transmissionconnecting said second shaft with said ram-reciprocating means; a clutch-unit secured =tosaid; housing eXteriorl thereof; a clutch element carried bywsai clutch-unit and rotatably journaled --on said second shaft; two driven-gears of unequal diameter secured to said clutch "element; a second clutch-element; non-rotatably secured to said secondshaft;-means to effect a driving connection between said clutch elements; a gear unit spline'd to said main-drive shaft and aflording driving gears complemental to. the driven gears on said clutch element and means selectively to mesh said complemental drivingiand driven gears to transmit to said second shaft two speeds from-a single speed in. the drive shaft.

4. In a shaping? machine including a main housing, aram reciprocable thereon, a prime driver located at one side of the machine, and means'including'a rotating crank and an oscillatingrocker-arm actuated thereby for reciprocating said ram; a power transmission, including .three serially arranged speed change devices, connecting said prime driver withzsaid crank for rotating the latter.at-any .one of more than tenspeeds from asinglespeed intheprime driver; andman ually actuable levers locatedlat aside ofthe machine remote from that at which the prime driver is located ifor selectively actuating each of saidspeed change devices.

-5. In a shaping'machine includinga main housing, a; ram reciprocable thereon, means to reciprocate said ram; a work table movable horizontally beneath said'ram, and a driven shaft journaled in said housing transverse to the ,path of reciprocation of said ram; first and second multiple-speed power transmission for actuating said ramreciprocating means from said driven shaft; a prime driver; a third multiplespeed power transmission between said prime driver and said driven shaft, saidfirst, second and'third multiple-speed transmissions being serially arranged andnadapted to transmltto sand ram-reciprocating "means more than ten speeds from aesinglei speed in the prime .driver;,ta main clutch on said drivenshaft for controlling the flowaof power'ther'eto from said prime vdriver; -table propelllng means; a slowspeed transmission operated from said ram-reciprocating means for actuating said. table ;propelling means at a feeding rate in synchronism -W1tl1- the.move

d transmission 0p,-

erable independently o said ram-reciproeating means for actuating said'table propelling'means at a rapid trave'rserate; and means'selectively to render effective eithersaid feed or traverse transmission.

"6. In a shaping machine including amain shaft journaled in said housing transverse to the path of'reciprocation of said ram; a multiple-speed 'powertransmission connecting said second shaft with said ram-reciprocating means 'a. sub-housing"removably' secured to said main housing exteriorly thereof at the users side of the machine; aclutch element carried by said sub-housing:- and rotatably journaledon' said second shaft; twodriven gears of'unequal diameter removably secured to said clutch element and replaceable by others of different size; a-secondtclutch element 'non-rotatably secured to said -:second shaft I means to effect va driving connection between said clutch elements; a gear unit spiined to a freeend of said main drive shaft and a'ffording driving gears complement-a1 to the driven. vgears on said clutch element; saidgear unit being removable from said main drive shaft for replacement by a similar unit providing gears of different size; and means-selectively to mesh said complemental driving and driven gears to transmit to said second shaft. two' speeds froma' single speed in the driveshaft.

' :TQIII a shaping machine including a main housing, a ram. reciprocable thereon, means to' reciprocate said ram, a sub-housing removably secured to said'main housing, and a main drive shaft; a power transmission including a driven shaft and a plurality of serially arranged sets of speed chan'ge devices between said main drive shaft and said ram-reciprocating means; one of said speed change .devicesbeing arranged in said'subhousing, and comprising a driving gear unit spline-d to said'drive shaftand providing two gears two gears rotatably journaled onsaid driven shaft of which one is adapted to be meshed wit-hone of the: gearsof' said driving unit; clutch means for engaging with said driven shaft:th"e :gears thereon; an intermediate gear unit providing one :1 gear adapted to beengaged by one of thegears of said driving unit,and another geanpermanently inmesh with the other gear: rotatably =journale'd on said driven shaft;:an'd means to shift said drivingg'ear unit;

'8. A ramreciproeating mechanism for.

shaping -mach-ines comprising a =-rocker-arm operatively' connected with the ram;a rotatablebull-wheelconnected to oscillate said arm; a prime driver; a driving connection between said prime driver and said bullwheel, 1 including. three sets of serially arranged multiple speed change :gears each. in-

eluding selectively operable gears for transmitting to said bull-Wheel more than ten speeds of rotation from a single speed in the prime mover; a master clutch for determining the action or inaction of the ram, said master clutch and the gears of one set being arranged in a removable casing located at one side of the machine, the gears of that set being removable and replaceable by another set of difi'erent ratio.

In Witness whereof, I have hereunto subscribed my name.

WILLIAM F. ZIMMERMANN. 

